2019_2020学年高中英语课时分层作业8（含解析）外研版选修9.docx

课时分层作业(八).单词拼写1The chart shows an up_(趋势) of meat prices.2The parents_(记录) every step of their childs development.3So far Internet has become the main channel through which the computer_(病毒) spread.4Sometimes an_(附件) with a nice name in your mail can be very dangerous.5If your computer shows such information, it warns you that you are_(感染)6The young teacher infected the whole class with her_(热情)7Patience combined with_(勤奋) is necessary to success.8Soon he was_(淹没，消失) up in the noisy crowd.9He has finished the reading of the book, but he has not_(消化) it.10England is_(接壤) on the north by Scotland.【答案】1.trend2.documented3.viruses 4.attachment5.infected6.enthusiasm 7diligence8.swallowed9.digested10.bounded.阅读理解Talking plants might sound like characters in a fairy tale.But recent scientific studies have shown that plants communicate with each other and with other living things in a surprising number of ways.To understand them, scientists say, we just have to learn their language.Farmers are especially interested in what plants have to say.“Plants are able to communicate with all sorts of organisms(有机体)They can communicate with giant bacteria, with other plants and with insects.They do this chemically，” said Cahill, an Ecology Professor of the University of Alberta in Canada.Plant scientists are just beginning to understand this chemical “language”Cahill says studies have shown, for example, that plants can evaluate conditions in their immediate environment and take appropriate actions.Plants have an ability, for example, to signal pain or discomfort caused by anything from temperature extremes to an insect attack.Jack Schultz, a professor of chemical ecology at the University of Missouri says when a plant senses that its being eaten, it cannot walk away from trouble; on the contrary, it will release a chemical vapor that alerts other plants nearby.“Their language is a chemical language, and it involves chemicals that move through the air, which are easily to be changed, and most of all are smells that we are familiar with, ” Schultz explained.“All plants responded to the attack by changing their chemistry to defend themselves, ” Schultz recalled.“But we were quite surprised to find that nearby plants also changed their chemistry to defend themselves, even though they were not part of the experiment.”Studies have also shown that plants under attack release pleasant chemicals.Those chemicals attract friendly insects that attack the pests eating the plant.In the end, plants ability to communicate their needsand our ability to understand themcould help farmers reduce the use of poisonous chemicals, cut operating costs and limit damage to the environment.【语篇解读】本文是一篇科普文。主要讲述了植物的特殊语言及其功能以及这种特殊语言对农业生产可能产生的指导意义。1. The recent scientific studies have shown that plants can_ .A. communicate with other living things in a chemical wayBhardly react to any sudden change in temperatureCuse a very special chemical language which is familiar to usDrespond to the attack by giving off poisonous chemicals【解析】事实细节题。根据第二段可知，植物可以通过化学反应来与所有有机体沟通交流。因此答案为A。【答案】A2. When being eaten by a pest, the plant will_.A. walk away from troubleBchange its chemistry to kill the insectCrelease a chemical vapor to “ask” other plants for helpDgive off nice chemicals to attract friendly insects to attack the pest【解析】事实细节题。由第三段“when a plant senses that its being eaten, it cannot walk away from trouble; on the contrary, it will release a chemical vapor”及倒数第二段“Those chemicals attract friendly insects that attack the pests eating the plant.”一句可知，当植物被昆虫吞食的时候，植物会释放出一种化学蒸汽来吸引有益的昆虫袭击害虫。故选D。【答案】D3. The underlined word “alerts” most probably means “_”AwarnsBprotectsCthreatens Dallows【解析】词义猜测题。根据前后文意可知，植物在遭受攻击时会释放一种化学物质，这种物质有两种功能：警示危险的存在和发出求助信息。由此可知答案为A。【答案】A4Which would be the best title for the passage?ACommunication between PlantsBA Chemical “Language”CPlants Can TalkDHow Plants Protect Themselves【解析】标题归纳题。短文讲述的主题是植物的特殊语言及功能。因此C项概括了文章主题同时又生动风趣，尤其是talk一词充满了拟人化的幽默感。故答案为C。【答案】CBIf you talk about a dogs life，go to Beijing to see the pampered(过分娇惯的)dogs.Dogs clipped，dressed up，washed and dried.Here, its the owners who go to the obedience(服从)school，and these people pay almost a thousand US dollars a month to learn how to properly care for their pets.Dogs are hot in Beijing，a symbol of a new middleclass family.Dogs or pets can take the place of children, even husbands.Qin Lu,23yearold dog owner，certainly thinks her dog makes some more loyal partner.Shes spending 1,300 yuan，thats almost 200 US dollars a month，sending her dog to the training school.Think about it，almost half her monthly salary as a secretary.Personally，if I have a dog，I want to give it the very best of everything.Otherwise，I wouldnt have a dog.Before we get too sentimental，though，other dogs in China have a far more grisly(可怕的) fate，many still destined for the dinner table, dog meat, a popular delicacy.But appetites are changing.What was once for the eating is now for the treating.Beijing alone is home to more than a million dogs.Owners spend an average 25 dollars a month on pets.Do the math.Dogs are big business.Ning Wei who runs this obedience school on the outskirts of Beijing said，“It has been open for almost three years.There are many dogs.And now we are opening another branch.”As their owners embrace everything western，so too are the dogs.Ning Weis specializing in producing a new breed of bilingual puppies.Yes，dogs understand Chinese and now English.“Im going to do a test now to see if they understand both English and Chinese effectively，if their Chinese is better than my English, and if their English is better than my Chinese.”【语篇解读】本文主要介绍了在北京人们对宠物尤其是狗的喜爱。5From the first paragraph we can know _ in Beijing.Adogs are tired of the hot daysBwhy people spend so much buying a dogCdogs are very expensiveDmany new middleclass families raise dogs【解析】细节理解题。根据文章第一段中的“Dogs are hot in Beijing，a symbol of a new middleclass family”可知，许多新的中产阶级家庭养狗，即D项正确。【答案】D6It can be inferred from the third paragraph that _.Athe author also loves dogsBdogs can take the place of children，even husbands or wivesCno dogs，no lifeDpeople will live a happy life with a dog【解析】推理判断题。根据第三段中的“if I have a dog，I want to give it the very best of everything”可推知，作者也喜欢狗，即A项正确。【答案】A7What can we know about Ning Wei from the passage?AHe is an English teacher in an obedience school.BHe is a businessman who runs an obedience school.CHe is a dogkeeper who is learning how to properly care for his dog.DHe is a researcher who is crazy for the bilingual puppies.【解析】细节理解题。根据第四段中的“Dogs are big business.Ning Wei who runs this obedience school on the outskirts of Beijing”可知，他是一位商人并经营一所宠物服从训练学校，即B项正确。【答案】B8From the passage we can conclude that _.Athere are many different kinds of dogs from all over the world in BeijingBmany Beijingers love dogs better than their own sons or daughters，even their husbands or wivesCteaching people how to treat dogs is hot business in Beijing nowDso much money has been spent on treating dogs【解析】推理判断题。根据第四段的“Dogs are big business”“It has been.opening another branch”可推知，教人们如何善待狗在北京是很热门的生意，即C项正确。【答案】C.语法填空 The best way to deal with sports injuries is to keep them from happening in the first place. Knowing the rules of the game youre playing and using the right 1._(equip) can go a long way toward preventing injuries. If you think youve been injured，pull 2._(you) out the game or stop 3._(do) your activity or workout. Let a coach or parent know what happened in case you need to see a doctor.Serious head and neck injuries happen most often in athletes 4._play contact sports like football.Keep the injured person still with his or her head 5._(hold) straight while someone calls for emergency 6._(medicine) help. If the person 7._(lie) on the ground，do not try to move him or her.Your first question after a sports injury will 8._(probable) be，“When can I play again？”T